Lifting Sensor (Front) Circuit Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION

With CONSULT-II

Check operation with "LIFT FR PULSE" on the DATA MONITOR to make sure the pulse changes.

LIFTING SENSOR (FRONT) OPERATION REFERENCE

Monitor item [OPERATION or UNIT]		Contents
LIFT FR PULSE	-	The front lifting position (pulse) judged from the lifting sensor (front) is displayed

Fig 1: CONSULT-II - Identifying "LIFT FR PULSE" On DATA MONITOR

Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Turn ignition switch OFF.
Check signal between driver seat control unit connector and ground, with oscilloscope.

Fig 2: Driver Seat Control Unit Connector P2 Terminal 25 Signal Specifications

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Signal Between Driver Seat Control Unit Connector And Ground With Oscilloscope

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Front lifting sensor is OK.
NG: GO TO 2.

CHECK FRONT LIFTING MOTOR SENSOR CIRCUIT HARNESS CONTINUITY
1. Disconnect driver seat control unit and lifting motor (front).
2. Check continuity between driver seat control unit connector P2 terminals 16, 25, 31 and lifting motor (front) connector P6 terminals 1,2,3.
  - 16 (W) - 3 (W): Continuity should exist.
  - 25 (LG) - 2 (LG): Continuity should exist.
  - 31 (L/Y) - 1 (L/Y): Continuity should exist.
3. Check continuity between driver seat control unit connector P2 terminals 16, 25, 31 and ground.
  - 16 (W) - Ground: Continuity should not exist.
  - 25 (LG) - Ground: Continuity should not exist.
  - 31 (L/Y) - Ground: Continuity should not exist.
  Fig 4: Checking Continuity Between Driver Seat Control Unit Connector P2 Terminals 16, 25, 31 And Lifting Motor (Front) Connector P6 Terminals 1, 2 And 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace lifting motor (front).
- NG: Repair or replace harness.